Do yourself a favor and don't buy one...I have one that came on my Nasty Nerve, and its absolutely horrible. Don't waste the cash.
Etek 2- Zick kit, Cure 4, NDZ trigger, Virtue OLED
'06 Orange Nasty Nerve- Tonton trigger, Titanium Boomstick back, Ultralite front, Check It Products on/off
'05 Impulse- Function LPR, Function Trigger, Function Feedneck, ECS Board, Centerflag Hyper Reg, Equilizer Bolt, Freak back, All American front, Check It Products on/off